Results 191 to 200 of about 36,673 (225)
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Sea-ice algae in Arctic pack ice during late winter
Polar Biology, 2007Pack ice around Svalbard was sampled during the expedition ARK XIX/1 of RV “Polarstern” (March–April 2003) in order to determine environmental conditions, species composition and abundances of sea-ice algae and heterotrophic protists during late winter. As compared to other seasons, species diversity of algae (total 40 taxa) was not low, but abundances
Johanna Ikävalko +2 more
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Studies of the Solar and Terrestrial Radiation Fluxes over Arctic Pack Ice [PDF]
, 1970 Abstract : The report describes some measurements carried out during 1972 AIDJEX that have not been accounted for in earlier reports under this contract. Determinations of the turbidity coefficient gave a mean value of 0-078, indicating that the dust scattering is considerable in the Arctic atmosphere.
Gunter Weller, Bjorn Holmgren
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Underwater Backscattering Strengths of Arctic Pack Ice
The Journal of the Acoustical Society of America, 1964The backscattering strengths under Arctic sea ice for octave bands between 12 cps and 4 kc/sec were measured, using explosive sound sources. The measurements were made from a camp established in April 1962 on broken and pressure-packed one-year ice over the Canada Deep.
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The Effect of Tensile Strength in the Arctic Ice Pack
2001The ice pack covering northern seas is composed of an aggregate of thick ridged and rafted ice, undeformed ice, and open water. Existing ice-ocean models of the Arctic ice pack are large-scale continuum models that use a plastic yield surface to characterize the constitutive behavior of the pack. An alternative approach, which captures far more detail,
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Near-Field Ice Management Tactics for Floating Drilling in Arctic Pack Ice
Arctic Technology Conference, 2016Abstract In order to be economically viable, Arctic floating drilling in high concentration pack ice requires very high confidence that ice interaction does not lead to costly, unanticipated emergency disconnections of the rig from the well.
Curtis Holub +6 more
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The Influence of the Arctic Pack Ice on Climate
1968An assessment is made of each component of the heat budgets of the surface and of the earth-atmosphere system in the central Arctic, both for an ice-covered ocean and for an ice-free ocean. The annual patterns of atmospheric heat loss for both conditions are obtained as residuals; the relation of these patterns to general atmospheric circulation and ...
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Observations of internal gravity waves under the Arctic pack ice
Journal of Geophysical Research: Oceans, 1987Internal gravity waves measured under the Arctic pack ice were strikingly different from measurements at lower latitudes. The total wave energy, integrated over the internal wave frequency band, was lower by a factor of 0.03–0.07, and the spectral slope at high frequency was nearly −1 in contrast to the − 2 observed at lower latitudes.
Murray D. Levine +2 more
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Rectilinear leads and internal motions in the ice pack of the western Arctic Ocean
Journal of Geophysical Research, 1977Large-scale (100 km) rectilinear lead patterns are a common feature of the Arctic Ocean ice cover. We show that many of the characteristics of these patterns can be explained by analogy with rock mechanics. In particular, the existence of two intersecting lead sets, the typical intersection angles of 28°, and the observed relative shearing motions are ...
Richard E. Thomson, John R. Marko
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Airborne dust on the Arctic pack ice, its composition and fallout rate
Earth and Planetary Science Letters, 1974Abstract Dust collected from snow samples on the Arctic pack ice approximately 500 km north of Alaska indicate lower fallout rates than previously reported for Arctic stations 1400 km to the east (3.3 and 14 μg/cm 2 yr, respectively). Either the lower frequency of southerly (off-shore) near surface winds at our sample sites off Alaska or the unknown
Lloyd H. Burckle +3 more
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The effects of individual ridging events on the ice thickness distribution in the Arctic ice pack
Cold Regions Science and Technology, 1996Abstract The sea ice thickness distribution in the polar oceans evolves in response to both dynamic and thermodynamic forcing. The variable thickness of the ice cover is created by deformation, that simultaneously causes formation of thick ice through ridge building and thin ice through lead creation.
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